Datasheet

 2011-2013 Microchip Technology Inc. DS40001574C-page 263
PIC16(L)F1938/9
FIGURE 24-22: I
2
C SLAVE, 10-BIT ADDRESS, TRANSMISSION (SEN = 0, AHEN = 0, DHEN = 0)
Receiving Address
ACK
Receiving Second Address Byte
Sr
Receive First Address Byte
ACK
Transmitting Data Byte
1 1 1 1 0
A9 A8 A7 A6 A5 A4 A3 A2 A1 A0
1 1 1 1 0
A9 A8 D7 D6 D5 D4 D3 D2 D1 D0SDA
SCL
SSPIF
BF
UA
CKP
R/W
D/A
1
2345
6789
1
2345
6789
1
2345
6789
1
23456
789
ACK
= 1
P
Master sends Stop condition
Master sends not ACK
Master sends Restart event
ACK
R/W = 0
S
Cleared by software
After SSPADD is updated, UA is cleared and SCL is released
High address is loaded
Received address is Data to transmit is
Set by software
Indicates an address
When R/W = 1;
R/W is copied from the
Set by hardware
UA indicates SSPADD
SSPBUF loaded with received address
must be updated
has been received
loaded into SSPBUF
releases SCL
Masters not ACK
is copied
matching address byte
CKP is cleared on
9th falling edge of SCL
read from SSPBUF
back into SSPADD
ACKSTAT
Set by hardware